Actually Feather, I know of several airport owners who are very keen for upgraded Cat II/III systems: esp MEL, SYD and CBR. MEL especially has invested in all the lighting infrastructure needed for Cat II at least (not sure about Cat III)
Look to ASA and CASA for the delays... From what I understand, the latter don't even have full standards written for Cat II/III and are currently urgently looking at getting something done about it!
Also whilst the Flying Ops departments of the major airlines couldn't get it fast enough, try talking to the bean-counter departments of the same airlines. Some have quite categorically stated (in writing) that there is no need for full Cat II/III in Australia (though I believe the view is changing on this!)